hugo/deps/deps.go

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package deps
import (
"io/ioutil"
"log"
"os"
"github.com/spf13/hugo/config"
"github.com/spf13/hugo/helpers"
"github.com/spf13/hugo/hugofs"
"github.com/spf13/hugo/tpl"
jww "github.com/spf13/jwalterweatherman"
)
// Deps holds dependencies used by many.
// There will be normally be only one instance of deps in play
// at a given time, i.e. one per Site built.
type Deps struct {
// The logger to use.
Log *jww.Notepad `json:"-"`
// The templates to use.
Tmpl tpl.Template `json:"-"`
// The file systems to use.
Fs *hugofs.Fs `json:"-"`
// The PathSpec to use
*helpers.PathSpec `json:"-"`
// The ContentSpec to use
*helpers.ContentSpec `json:"-"`
// The configuration to use
Cfg config.Provider `json:"-"`
// The translation func to use
Translate func(translationID string, args ...interface{}) string `json:"-"`
Language *helpers.Language
templateProvider ResourceProvider
WithTemplate func(templ tpl.Template) error `json:"-"`
translationProvider ResourceProvider
}
// Used to create and refresh, and clone resources needed.
type ResourceProvider interface {
Update(deps *Deps) error
Clone(deps *Deps) error
}
func (d *Deps) LoadResources() error {
// Note that the translations need to be loaded before the templates.
if err := d.translationProvider.Update(d); err != nil {
return err
}
if err := d.templateProvider.Update(d); err != nil {
return err
}
d.Tmpl.PrintErrors()
return nil
}
func New(cfg DepsCfg) *Deps {
var (
logger = cfg.Logger
fs = cfg.Fs
)
if cfg.TemplateProvider == nil {
panic("Must have a TemplateProvider")
}
if cfg.TranslationProvider == nil {
panic("Must have a TranslationProvider")
}
if cfg.Language == nil {
panic("Must have a Language")
}
if logger == nil {
logger = jww.NewNotepad(jww.LevelError, jww.LevelError, os.Stdout, ioutil.Discard, "", log.Ldate|log.Ltime)
}
if fs == nil {
// Default to the production file system.
fs = hugofs.NewDefault(cfg.Language)
}
d := &Deps{
Fs: fs,
Log: logger,
templateProvider: cfg.TemplateProvider,
translationProvider: cfg.TranslationProvider,
WithTemplate: cfg.WithTemplate,
PathSpec: helpers.NewPathSpec(fs, cfg.Language),
ContentSpec: helpers.NewContentSpec(cfg.Language),
Cfg: cfg.Language,
Language: cfg.Language,
}
return d
}
// ForLanguage creates a copy of the Deps with the language dependent
// parts switched out.
func (d Deps) ForLanguage(l *helpers.Language) (*Deps, error) {
d.PathSpec = helpers.NewPathSpec(d.Fs, l)
d.ContentSpec = helpers.NewContentSpec(l)
d.Cfg = l
d.Language = l
if err := d.translationProvider.Clone(&d); err != nil {
return nil, err
}
if err := d.templateProvider.Clone(&d); err != nil {
return nil, err
}
return &d, nil
}
// DepsCfg contains configuration options that can be used to configure Hugo
// on a global level, i.e. logging etc.
// Nil values will be given default values.
type DepsCfg struct {
// The Logger to use.
Logger *jww.Notepad
// The file systems to use
Fs *hugofs.Fs
// The language to use.
Language *helpers.Language
// The configuration to use.
Cfg config.Provider
// Template handling.
TemplateProvider ResourceProvider
WithTemplate func(templ tpl.Template) error
// i18n handling.
TranslationProvider ResourceProvider
}